Vibrates 4 times and stops heat cycle

Started doing it recently , it will heat up fine and I’ll take my dab but usually 3/4 of the way through the cycle it will vibrate 4 times and stop the cycle. I can hit the temp button on the app again and basically start a new dab where it left off but why is it doing this all a sudden ? I have a 3dxl could that be going bad ?